You can check out our source repository at: https://github.com/apache/incubator-ponymail
Our web site is generated from the asf-site branch in following repository: https://gitbox.apache.org/repos/asf/incubator-ponymail-site.git
e.g. git clone -b asf-site https://gitbox.apache.org/repos/asf/incubator-ponymail-site.git ponymail-site
See the BUILDING.txt file in the repo for instructions.